12890866280 has 16 divisors (see below), whose sum is σ = 29004449220. Its totient is φ = 5156346496.

The previous prime is 12890866279. The next prime is 12890866321. The reversal of 12890866280 is 8266809821.

It can be written as a sum of positive squares in 2 ways, for example, as 11173758436 + 1717107844 = 105706^2 + 41438^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 161135789 + ... + 161135868.

Almost surely, 2^12890866280 is an apocalyptic number.

12890866280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12890866280 is an abundant number, since it is smaller than the sum of its proper divisors (16113582940).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12890866280 is a wasteful number, since it uses less digits than its factorization.

12890866280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 322271668 (or 322271664 counting only the distinct ones).

The product of its (nonzero) digits is 663552, while the sum is 50.

The spelling of 12890866280 in words is "twelve billion, eight hundred ninety million, eight hundred sixty-six thousand, two hundred eighty".